Seaming head



March 2 1926. 1,574,764

s. N. TEVANDER SEAMING HEAD Filed Augus't l 1920 3 Sheets-Sheet 1 S. N. TEVANDER March 2 SEAMING HEAD Filed August 16. 19 20 3 Sheets-Sheet 2 w .J n M 1 V H m m Q/H l f l w a M! K a 5 I [11H] I 1 I ll W f ll \S H I] N //.!WW|M WWW,

' March 2,1926. v 1,574,764

v s. N. TEVANDER SEAMING HEAD I Filed Augu St 16, 1920 3 Sheets-Sheet 5 Patented Mar. 2., i925.

: i T E D SITE SWAN 'N. 'TEVANLDER, iO'F LIvlAY'WIQQD,

.lLLINIOIS, ASS'IGNOB 3E6 AMERICAN CAN COINE- SEAIVHNG: HEAD.

Application filed August 18, "1920. "serial 'No. 403308.

T 0 all whom it may concern:

Be it known that I, SWAN N. 'lnviinnnn, a citizen of the United States, residing in ll laywoodpin the county of Cool: and State of Illinois, have invented a new and useful Improvement in Seaming Heads, of which the following is a specification.

This invention relates in general to seaming heads for forming the seams between can bodies and can heads wherein the can bodies and heads are provided with flanges adapted to be interfolded and pressed into tight he *me tically sealed relation.

A principal object of the invention is the provision of a double seaming mechanism adapted by reason of its construction and operation to insure the formation of .a more uniformly accurate vand desired relation of the inter-folded parts in the finished seam. My invention contemplates in this respect the provision of a definite line of bend at the top of the seam so that there will exist a uniform amount of metal beyond said line of bend and in the finished seam, and this through the utilization of merely first and second operation rolls suitably constructed, mounted and operated to accomplish this result.

Another importantobject of the invention is the provision ofan improved process of seaming, which includes the simultaneous folding of the flanges into interlocking relation and bending from the horizontal p0- sition they have been given to permit assembling.

A further object of the invention is the provision of an .improvel roll mounting capable of general use in seaming heads and which will permit of accurate adjustment of the rolls to meet desired conditions.

Another important object of the invention is the provision of a seaming head wherein the rolls may be readily rearranged to operate upon cans of various sizes and further be readily adjustable in any of the assumed positions.

Another important object of the invention is the provision of a seaming head having cam actuated roll carrier 'leve s, said cams and .levers being of improved type and construction.

Another important object of the invention is the provision of a seaming head having these and other advantages, which will not include delicate, complicated or expensive :parts and which may be readily used without special education of attendants and operators usually available for the purpose, and which will not require frequent repairs or replacement.

Numerous other objects "and advantages of the invention :will "be apparent as it is better understood "from the following description, which taken in connection with the accompanying drawings discloses *a pre ferred embodiment-thereof.

Referring to the drawings,

Figure 1 is a vertical sectional view of a seaming head embodying my present invention and'showing the'firs't operation-rolls 1n action; r

Fig. 2 is a similar view and showing the second operation rollsinaction;

Fig. 3 is a-section taken substantially 0n the line 3-3 of Fig. 2, "the parts of the head being removed to disclose certain details; i

can being shown as the first operation rolls come into action";

Fig. 5 is a similar View showing the arrangement at the end of the action --of the first operation roll, the beginning of the action of the second operation roll being indicated in dotted linesyand Fig; 6 is a "VlGW similar 'to Fig. 5 showing the relation ofthe parts at the end of the action of the second operation roll. For the purpose of illustrating my invention '1 have shown on the drawing as much of a double seaming apparatus or machine as is believed "necessary to :an understanding of my present invention. liteference character ll indicates a portion 'of the mainframe of the machine which forms a bearing for the stem 12 of a main support 13 which may he lifted "in any usual or preferred manner to *bring a can 14 resting upon it into contact with :an'np'per chuck 15. Reference character 16 indicates the housing of a seaming head through which extends a shaft 17 'to the bottom of which is fixed a carrier member 18. This carrier member is provided with four recesses '19 arranged 90 apart and of rectangular formation. The recesses 19 6X- tend in radially of the carrier member and are provided with inwardly extending shoulders 21 formed 'by reducing the width of the recesses at appropriate distances from Fig. 4 1s an enlarged partial 'view', the

the outside. The shoulders 21 may also be described as extending in directions which are tangential to a circle (not shown) which may be drawn from the axis of the seaming head.

Roll carrying levers 22 are mounted in these recesses as will now be described. A block or yoke 23, adapted to fit in the larger portions of the recesses 19, is secured in place by bolts 24 disposed through each block and through spacing members 25 and into the material back of the shoulders 21. These spacing members are provided with wings 26 extending up above the top of the carrier member and having apertures 27 to receive pivot pins 28. Each roll carry ng lever is provided with a journal 29 on which a roll 3l-32 may be rotatably mounted, which roll is held in place by a headed pin 33, the body 84 of the pin extending into an opening in the end of the lever and held in place by the cross pin 35.

Each lever 22 is provided with two lugs 36 adapted to receive the pivot pin 28 when the parts are assembled. The lever extends up in the form of a tail 37 in which is mounted a set screw 38 the purpose of which will presently appear. The levers are adapted to be actuated by cams 39-4l upon a cam carrying sleeve 42movable vertically on the shaft 17, this sleeve having flanges 43 and 44 defining between them a recess 45 for engagement by a suitable cam elevating and lowering member (not shown on the drawing).

The cams 394l are adapted to be engaged by rolls 4:6 in the levers 22, each said roll being mounted in an arm 47 pivoted upon the pivot pin 28 and having a part 48 for engagement by the set screw 88, already mentioned.

In the present instance the rolls and adjustment are such as to produce a seam wherein a uniform accurate arrangement of the interfolded metal parts is produced although it will be manifest that the roll control arrangement may be used in machines where this accuracy and uniformity is not so maintainable or at least so readily maintainable. Referring to Figs. 4 and 5 it willv be noted that the first operation roll, i. e., that indicated by the reference character 31 is brought up in inclined position into engagement with the cover flange 51 and as an initial part of its movement bends the cover flange 51 and body flange 52 on sharply defined lines of bends 53 and 54, re spectively, and at the same time that it tucks or bends up the curl 55'close against the underside or behind the body flange 52 (Fig. 5). I have found that this action is accomplished to best advantage when the surface 56, is arranged at an angle acute with respect to the horizontal and approximately 17.

The second operatiouroll, that indicated at 32, is preferably arranged substantially horizontally when in seaming position and compactsthe seam as indicated in Fig. 6 bending it back against the can body.

The operation of the apparatus is substantially as follows-The can support is lifted to engage the can with the upper chuck and is thereafter held stationary until the seaming is completed. The seaming head revolves in the present instance about the can and during this revolution the sleeve 4-2 is moved upwardly. This upward movement of the sleeve causes the cams to engage the cam rolls 4L6 (Fig. l) and bring the first operation rolls into seaming position. Slight further movement permits these cam rolls to pass the high points of the cams 39 permitting the first operation seaming rolls to move out of action. At or about the same time the cams 4-1 are engaged by the cam rolls of the second operation roll carrying levers (Fig. 2) and the seam is completed.

It will be manifest that the blocks 25 may be readily removed and others of different thickness substituted therefor, so that the rolls and roll carrying levers may be moved bodily toward and from the axis of the seaming head to facilitate adjustment to cans of different diameters. If, as usually the case, it is desired to maintain the angularity of the rolls for cans of different sizes this may be readily accomplished by adjustment of the set screws to compensate for the lateral bodily shift of the can cairying levers. Further it will be readily understood that for the same size can different angularity may be provided by appropriate manipulation of the screws 38.

I have shown and described a seaming head having a vertical axis and a seaming roll having an axis at an acute angle to that of the seaming head, but it will be understood that these parts may be otherwise arranged as may be desirable and practicable provided said relationship of said axes be preserved.

It is thought that the invention and many of its attendant advantages will be under stood from the foregoing description, and it will be understood that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A double seaming head, comprising in combination, a set of can holding members, and a set of roll carrying members mount ed for relative rotation and rolls carried by said roll carrying members, and means causing said rolls to successively move iniii ward .and engage and bend the cover flange and body flange of the can in said holding members, the roll which is caused to so operate being formed with an upper relatively long groove wall which engages on top of and depresses said flanges and with a lower relatively short groove wall which curls the extremity of the cover flange under the body flange.

2. A seaming head, comprising in com bination, can holdin members, a operation roll and carry ng member therefor and means for operating the sax c, said roll serving in its initial action to define the top line of bend or": the seam at the peripheral line of the mouth of the can body, the roll which is caused to so operate being formed with a groove having substantially parallel top and bottom walls inclined upward toward the top edge of the can.

8. A seaming head, comprising n combination, can holding members, a first operation roll, a first operation roll carrying member, and means for operating the same, said roll first bending down the cover and body flanges and then bending the curl of the cover flange behind the body flange after bending the cover and body flanges to an inclined position.

4. A seaming head, comprising in combination, can holding members, a first operation roll, a first operation roll carrying member, means "for operating the same, said roll first bending down the cover and body flanges and then bending the curl of the cover flange behind the body flange alter bending the cover and body flanges to an inclined position, and a second operation roll for bending the flanges thus joined into contact with the body wall to complete the seam.

5. A seaming head having a vertical axis, comprising in combination, a roll carrying member, a roll movable into seaming position and having a flange engaging part which is substantially flat and inclining to the horizontal and inward and upward and presenting a surface arranged an acute angle with the horizontal, and means For moving said roll into seaming position for the first part of the seaming operation.

6. A seaming head, comprising in combination, a roll carrier and roll mounted therein and having a relatively flat flange engaging part, said roll having a swinging movement and presenting said flat surface or said flange engaging part to the flanges of the can at an acute angle 6. A seaming head having a vertical axis, comprising in combination, a roll carrying member, a roll movable into seaming position and having a flange engaging part presentlng a surface arranged at an angle of 17 to the horlzontal and extending upwardly and inwardly, and means tor moving said stantia ly roll into seaming position for the first part of the seaming operation.

8. A seaming head, comprising in combination, a roll formed with a relatively deep groove having flat top and bottom surfaces substantially parallel witheach other and inclined upward and inward toward he langed can edge for positively bending the body and cover flanges downward toward seamed'position and then folding the edge of the cover flange beneath the body flange.

9. A seaming head, comprising in com bination, a roll formed with a relatively deep groove having flat top and bottom surfaces substantially parallel" x h each other and inclined upward and inward toward the flanged can edge "for positively bending the body and cover flanges downward toward earned position and then folding the edge of the cover flange beneath the body flange, and a second roll for completing the bending action to produce the finished seam. j

'10. A seaming head having a vertical axis, comprising in combination, a carrier member, a lever carried thereby and pivoted to swing toward and from the can, a rollcarried by said lever and means comprising a pivoted arm and a vertical roller 46 mounted therein on a substantially horizontal axis and a screw 38 for angularly adjusting the position of the lever when'presenting the roll to the can.

11. A seaming head having a vertical axis, comprising in combination, a carrier mem- Jer, a. lever mounted therein, a roll carried by said lever, and means comprising an arm pivoted on said lover, a cam-engaging roller mounted on a substantially horizontal axis in said e m and devices for changing the angularity of said arm relative to said lever for adjusting the position of said lever bodily with respect to the can.

A seaming head, comprising in combination, aca-rricr member, a lever mounted therein, a roll carried by said 'lever and for red with a radial groove having a sublat upper side, which groove inclines upwardly and inwardly toward the top of the can when the roll is in flangebending position, and means for eli'ecting both angularly and bodily adjustment of the lever.

13. A seaming head, comprising in combination, a carrier member, a lever mounted therein, a roll carried by said lever and formed with a relatively deep seaming groove having substantially flat and parallel upper and lower walls, said lever shiftable bodily toward and from the axis of said member to accurately adjust it with respect to cans of different diameters.

1 A seaming head, comprising in co bination, a carrier nember, a lever mounted therein, a roll carried by said lever and formed with a relatively deep seaming groove having substantially parallel upper and lower walls, said lever shiftable bodily toward and from the axis of said member to accurately adjustit with respect to cans of dilferent diameters, and means for eflecting angular adjustment of the position of the roll when presented to the can and causing said groove to incline upwardly and inwardly toward the top edge of the can.

15. A seaming head, comprising in combination, vertically disposed roll carrying levers having at their upper ends cam-engaging rolls mounted on substantially horizontal axes, arms carrying said axes and pivotally mounted on said levers, means for adjusting said arms relative to said levers, and a vertically movable cam member for swinging said levers into seaming position.

16. A seaming head having a vertical axis, comprising in combination, a reciprocating chuck, a carrier member movable with said chuck, roll carrying levers vertically mounted in said carrier member, and a vertically movable cam engaging said levers to move them into seaming position, rollers having substantially horizontal journals and engaging said cam, arms carrying said journals and pivotally mounted on said levers, and means for adjusting the angularity of said levers relative to said arms.

1?. A seaming head, comprising in combination, a chuck, a carrier member, vertically disposed levers mounted in said carrier member, first and second operation rolls carried by said carrier member, and a cam member having first and second operation cams and vertically movable to engage said cams successively with the first and second operation roll carrying levers, said first operation rolls formed with relatively deep grooves having substantially flat inner faces which extend at, an angle upward and inrard toward the top edge of the can when the rolls are in seaming action.

18. A. seaming head having a vertical axis, comprising in combination, a carrier memher, a roll carrying lever mounted therein, a cam for actuating said lever, a cam engaging arm mounted on a substantially horizontal axis carrying a vertical roller.

in said arm, said arm being pivoted in said roll carrying lever, and an adjustable connection between said arm and said lever.

19. A seaming head having a vertical axis,

comprising in combination, a carrier mem- I her, a roll carrying lever pivoted therein, a cam for actuating said lever, and a cam roll carrier in said lever, a seaming roll carried at an upward and inward inclination on the lower part of said lever, and a camengaging roll mounted on a substantially horizontal axis on said roll carrier.

20. The process of seaming can ends to can bodies, which comprises as an initial operation the simultaneous bending of the can body and can end flanges from the radial position and inclining them downward, and then the curling of the can end flange relative to the can body flange.

:21. The process of seaming cans, which con'iprises as an initial step, the simultaneous bending of the flanges ot' the can body and of the can end from an original horizontal position to a downwardly and outwardly inclined position and the positive bending of the cover flange into a position behind and beneath the body flange after both of said flanges have been so bent into inclined position.

The process of seaming cans, which comprises first the simultaneous bending down of the can end flange and the can body flange, said bending being from a point at the circumference of the mouth of the can and thereby giving to said flanges a frusto-conical formation and leaving the edge of the cover flange uncurled, and then curling the edge of the cover flange under and up within the body flange.

23. The process of seaming cans, which comprises first the simultaneous bending down of the can end flange and the can body flange, said bending being from apoint at the circun'iierence of the mouth of the can and thereby giving to said flanges a frustoconical formation and leaving the edge of the cover flange uncurled, and then curling the edge of the cover flange under and up within the body flange, and then curling both of said flanges inward against the can body.

SWVAN N. TEVANDER. 

